Hydra C 测汞仪介绍.pptx

1、Hydra C,Direct Analysis of Hg by Thermal Decomposition,Hydra C,Hydra C - Principle of Operation,Solid or liquid samples are weighed and introduced in the Hydra C The sample is initially dried and then thermally decomposed in an oxygen flow Combustion products are carried off and further decomposed i

2、n a hot catalyst bed Mercury vapors are trapped on a gold amalgamator and subsequently desorbed for quantitation The mercury content is determined using atomic absorption,Hydra C System Schematic,Decomposition Furnace,Catalyst Furnace,DryingTube,Amalgam Furnace,Absorption Cells,High Sensitivity Low

3、Sensitivity,50-900C,600C,Delay Tube,O2 Supply,Calibration,Options for Calibration Aqueous standards Certified Reference Materials Mass-based Measurements Use different amounts of same standardto generate calibration curve Use different standards,EPA Method 7473,Reference Method Validation,Characteri

4、stics of Method 7473,The method has a dynamic range that spans approximately four orders of magnitude Instrumental detection limit for this method is 0.01ng total mercury. Method 7473 is designed for the determination of mercury in solids, aqueous samples, and digested solutions in both the laborato

5、ry and field environments. Total analysis time of most samples is less than five minutes in either the laboratory or field setting.,Benefits of This Approach,Direct determination of Hg at trace levels with solid or liquid samples No time consuming and complex sample digestion step No wet chemistry p

6、re-treatment step Eliminates toxic waste disposal Fast, approximately 5 minutes per sample Sample matrix independent analysis Use one calibration for most sample types Use standard operating conditions for most sample types Run multiple sample types automatically without operator intervention Valida

7、ted results (US EPA method 7473) for solid and liquid matrices,In Contrast Standard CVAA Requires,Strong acids Sulfuric Proposed Rule.,Clean Air Mercury Rule,SUMMARY: In this document, EPA is finalizing the Clean Air Mercury Rule (CAMR) and establishing standards of performance for mercury (Hg) for

8、new and existing coal-fired electric utility steam generating units (Utility Units), as defined in Clean Air Act (CAA) section 111. The amendments to CAA section 111 rules would establish a mechanism by which Hg emissions from new and existing coal-fired Utility Units are capped at specified, nation

9、-wide levels. A first phase cap of 38 tons per year (tpy) becomes effective in 2010, and a second phase cap of 15 tpy becomes effective in 2018. Facilities must demonstrate compliance with the standard by holding one allowance for each ounce of Hg emitted in any given year. Allowances are readily tr

10、ansferrable among all regulated facilities. Such a cap-and-trade approach to limiting Hg emissions is the most cost-effective way to achieve the reductions in Hg emissions from the power sector.,Hydra C Specifications,Hydra C Specifications,Hydra C Specifications (cont.),Sales Training Conclusions,T

11、he potential for growth with the Hydra C is substantial. International interest and opportunity The technique has several powerful attractions to the analytical community. Rapid sample turnaround, usually less than 5 minutes from the receipt of sample until results are available. Versatile- Run all

12、types of samples from a single calibration Simple analysis with no sample preparation or dilution calculation. Safe- No corrosive reagents to be handled Inexpensive- No hazardous waste to dispose. Sample amount needed for analysis is modest.,We have an opportunity to capture a significant portion of

13、 this available market. Problems with competitive products Software limitations and limited workstation hardware (Milestone). Transport mechanism jams (Milestone) Limited access to catalyst and gold trap (Milestone) Overheating (Milestone) High concentration samples (Milestone) Use of buffers (Nippo

14、n) Autosampler misalignment (Leco),Sales Training Conclusions,Marketing Literature,To introduce the Hydra C we will need to complete the following marketing tasks: Press Releases E-blasts Topics for several e-mail transmissions Application Notes for key sample types Mailer/ Cover tip/ Advertisement Photoshoot Brochure for Hydra C Website on-going Videos for sales, training & installation,Hydra C Pricing,End